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twice. introducing a stunning workoftechnology--the entirely new lexus es. and the first-ever es hybrid. this is the pursuit of perfection. >>> elizabeth warren and scott brown squared off in the second of four debates last night in lowell, massachusetts. this hosted by umass lowell and the boston herald and moderated by our own david gregory. the two candidates clashed on topics ranging from the economy and taxes to warren's native american heritage and whether or not brown would be a stooge for a future president mitt romney. >> you support president romney -- excuse me governor romney for president, i assume? >> when it comes to dealing with the economic issues yes, absolutely. we're two different people. i'm from -- >> you would be a reliable alley when it came to his economic plan. >> on his economic plan, you said there's nobody better or i would trust more than governor romney. >> i would like to read the bills as i do. a lot of people don't read the bills down there. see how they affect massachusetts, our country and debt and deficit and vote. i am a reliable vote for the